Green’s Dictionary of Slang

coot n.3

[abbr. cooter n.1 ]
(US campus)

1. the vagina.

[US]G. Underwood ‘Razorback Sl.’ in AS L:1/2 57: coot n 1: Vulva or vagina; coitus with a woman.

2. a woman considered solely as a sexual object.

[US]G. Underwood ‘Razorback Sl.’ in AS L:1/2 57: coot n [...] 2: Woman considered as a sexual object.